Now we have the results provided by HD Tune.

Here Seagate Barracuda LP was the fastest drive, being 10% faster than Western Digital Caviar Black, 11% faster than RE4 and 23% faster than Caviar Green. Caviar Black and RE4 achieved the same performance level, being 12% faster than Caviar Green. Keep in mind that the burst transfer rate measures the maximum transfer rate between the motherboard SATA port and the hard disk drive controller located on the drive itself, and may not represent real-world performance.

Here once again Western Digital RE4 and Caviar Black achieved the same performance, being 17% faster than Seagate Barracuda LP and 41% faster than Caviar Green.

The maximum transfer rate is achieved when the hard drive is reading data from its outer-most tracks.

Here once again Caviar Black and RE4 achieved a similar performance, being, on average, 13% faster than Barracuda LP and 41% faster than Caviar Green.

The minimum transfer rate is achieved when the hard drive is reading data from its inner-most tracks.

Here RE4 was a little bit faster than Caviar Black (6%). RE4 was 23% faster than Barracuda LP and 44% faster than Caviar Green, while Caviar Black was 16% faster than Barracuda LP and 36% faster than Caviar Green.